Sofirn SP70's have an uneven shelf, need others to check too.

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Funtastic
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Sofirn SP70's have an uneven shelf, need others to check too.

Hi all,

I received a large order of SP70’s and one had half the led not working and the other only quarter.

- Is that just a bad batch of XHP70’s?
- Poorly reflowed?
- Driver issue causing it?

Deciding what to ask Sofirn for in parts. I’d rather fix them than ask Sofirn for a refund, maybe I should be doing both. I am a supplier but not an authorized one so what do you guys think, should I be getting a refund? I usually fix faults but maybe I shouldn’t be putting up with it and always requesting refunds

UPDATE

All Sofirn SP70’s have an uneven shelf. They’re covering this issue by applying way too much thermal paste to make it look like it’s making good contact but it’s not. There’s enough paste for 3-4 SP70’s on one unit.

Received 3x more SP70’s to find 1pc wasn’t making contact. Decided to wipe off the other units thermal paste and check, they too had the same problem

I’m going to make a video applying my own paste to make it clear to them, this is terrible quality control.

Ignore my hand tremors. Just a video I sent to Sofirn to show the issue

Texas Ace Lumen Tube calibrated with maukka lights

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Edited by: Funtastic on 12/21/2020 - 17:55
Lightbringer
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I’d just reach out to Sofirn (rep’s right here on blf) and see what he/she could do.

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alpg88
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sounds like bad leds, driver would not be causing that normally, if reflow job is bad they would not light up at all. or if shorted just blink once with every turn on.

Funtastic
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Just had a 3rd XHP70.2 in another SP70 die, only half lit

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niajef
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sorry how does it have half or a quarter of the led not working? doesnt it only have 1 led in the light?

or are you saying you had 2 orders of sp70s, and in 1 batch, HALF the sp70s had defective leds, and in another batch, 1/4 of the sp70s had defective leds?? cuz thats a VERY high failure rate

Funtastic
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An XHP70.2 has 4 dies, 2 of which are dead

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niajef
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oh! did not know that

Artiet59
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Yes, xhp50.2 is same thing. And to OP – I recently reflowed an xhp50.2 to my EC01 and had the same issue with only half the LED lighting up, and it was ultimately bad reflow/ mcpcb being damaged. I’d say that’s the issue, because when I flowed the same xhp50 onto a different mcpcb (ft03) it works fine. That’d be my guess. Mcpcb or reflow issue

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Probably a bad reflow.

mortuus
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ouch thats just bad, sounds like a faulty batch if so many.. but that should go under warranty if they arrived like that, hope they can solve this quick.

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Funtastic
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mortuus wrote:
ouch thats just bad, sounds like a faulty batch if so many.. but that should go under warranty if they arrived like that, hope they can solve this quick.

Oh absolutely, no worries about getting it fixed.

Since the last 2pcs I’ve only sold approx 5 units so it’s been quite a high failure rate.

I’ll try reflowing it but I’ll get a replacement led and mcpcb anyway, maybe I’ll ask for a couple

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Funtastic
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Turns out the shelf isn’t flat, the mcpcb wobbles side to side.

Wiped the thermal paste off mcpcb and reinstalled it, this is how much contact its truly making.

I’m getting a bit annoyed at Sofirn’s lack of QC. Recently made a post about 10pcs SP40 and 2pcs SP70 with ano issues which they tried covering up. I received $30 compensation so that’s sorted but still….

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Zappaman
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As a dealer, at least they will take care of you. Thumbs Up An unevenly milled shelf for THAT LIGHT is a pretty bad miss though Facepalm

I was going to say that emitters that I’ve burned out usually failed starting at one side like yours did, and it was due to overpowering (overheating) them OR my bad solder job mounting them. The failed cooling with an uneven shelf explains the problem now in hindsight.

I have never received a bad light from Sofirn out of about 40 or so I’ve bought over the last three years. Of course, some of that stock I still have new in the box! So I’m now hoping it’s all in good shape when I get to it.

Still, for the value they give us… I’d guess they might have some QC slips occasionally like any company doing what they do. I am glad to know they will at least step up and take care of the problems when they do arise.

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Funtastic
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They’ll definitely sort it out but hope they’ll send a new unit and not just a replacement head since this is one of the units with the ano issue. I’d like to fix this unit but I don’t have the tools to level it

I was out making a demo video and was thinking “this jump from High to Turbo is tiny”, couple seconds later it starts flickering and half of it dies. I really hope the others I have in stock are okay.

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Funtastic
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Just switched on a second unit for a turbo run to test and it starts flickering…….bad batch of lights, damn it

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Zafiro Añejo
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I noticed that exactly after 3min my SP70 steps down from turbo mode to low mode, not high mode.

Funtastic
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Zafiro Añejo wrote:
I noticed that exactly after 3min my SP70 steps down from turbo mode to low mode, not high mode.

If it’s reaching 50°C it’ll step down lower than High. If it’s just on 3 min and it’s not hot then maybe there’s an issue. Are you in ramping or stepped mode. maybe it reduces to the last ramp level? Who knows, I haven’t had that issue

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Zafiro Añejo
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It occurs in stepped modes on turbo and in ramping when set to maximum. If ramped down only a little bit the stepdown will not be triggered. It does not matter what level I used before, always forcing the flashlight down to low mode.

Funtastic
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Zafiro Añejo wrote:
It occurs in stepped modes on turbo and in ramping when set to maximum. If ramped down only a little bit the stepdown will not be triggered. It does not matter what level I used before, always forcing the flashlight down to low mode.

No idea, if it bugs you then perhaps email Sofirn.

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mortuus
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i hope this doesnt mean sofirns quality has got lower now….

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Funtastic
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Just letting everyone know that Sofirn are sending me 2x SP70 replacements without any trouble at all. Took a couple emails to explain the issue but that’s to be expected.

So many companies would have asked for it to be shipped back for repair at this price point.

I haven’t yet been let down by Sofirn’s customer service.

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Funtastic
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UPDATE

All Sofirn SP70’s have an uneven shelf. They’re covering this issue by applying way too much thermal paste to make it look like it’s making good contact but it’s not. There’s enough paste for 3-4 SP70’s on one unit.

Received 3x more SP70’s to find 1pc wasn’t making contact. Decided to wipe off the other units thermal paste and check, they too had the same problem

I’m going to make a video applying my own paste to make it clear to them, this is terrible quality control.

Texas Ace Lumen Tube calibrated with maukka lights

New Zealand store – https://www.piercingthedarkness.co.nz (NZ customers only)

YouTube channel – https://www.youtube.com/channel/UCIUWi2vYp4CWrRkOJM70t_w/videos (Demos for my customers, and reviews)

zoulas
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Is it just the SP70 that has the problem?

Funtastic
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zoulas wrote:
Is it just the SP70 that has the problem?

From what I’ve seen, yes. In total I’ve had 5pcs out of 12 where the led died. Now I know why it’s happening,

My video I sent to Sofirn just now. Ignore my left hand tremors, also no audio.

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Funtastic
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Anyone out there that can check theirs?

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How new are these? I have an SP70 from the first batch and the shelf is flat – I recently modded it and redid the thermal paste with mx4

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Funtastic
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Scallywag wrote:
How new are these? I have an SP70 from the first batch and the shelf is flat – I recently modded it and redid the thermal paste with mx4

The units I have in stock are within the last 8 months, the one in the video was ordered end of last month. Checked all units and same issue, some only half make contact and others it’s next to nothing. 3 burnt out leds from the older stock

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Tom E
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Ok, I think what's goin on is from the machining it left a bump up in the middle - is that correct? This is quite common, unfortunately, least in lights I usually mod (the lower end, budget level). You will never find that in some brand lights I'm sure - probably true for MaxToch.

You can usually spot them easy - sit the MCPCB in there and see if it wobbles or not. If not, there could still be a depression in the middle, so still have to check for that. If there's a good grease under the MCPCB, the MCPCB should be suctioned to the shelf surface so you have to pry it off. If there's no suction, there's probably a contaminate in the way or something is not flat.

Not surprising at the prices Sofirn charges, also it's been so common in China for initial batches to be superior quality, then later batches drop in quality - just how they do business unless you really stay on top of them.

Brass P60 pills for example are known for this. With those I would take a large nailset or punch and give it a couple taps of the hammer and could flatten them out every time. Easy way to check is a metal flat edge, like the end of a small SS ruler - I use one often to check for flatness. For these SP70's, I wouldn't hammer. Most alum shelfs I'll sand it out, starting with maybe 200-300 GRIT paper. Lot of times you can see that middle point go down and down, constantly checking with the flat edge.

It's just something I always do when modding. Got to take out that MCPCB and discover what's underneath - many times there's surprises like a fragment of solder stuck - they don't check, they don't care. Do you think Convoy's are made and assembled by Simon or Emisar's made and assembled by Hank? Nope, so do those workers care as much as Simon or Hank? Nope.

PM'ing with Richard at MtnE in the past, wow, nightmare's of entire Convoy batches messed up. People wondered why he didn't stock this or that, and many times the lights and parts came in but had to be rejected - he would not sell them in that condition.

I feel for you. I toy'd with the idea of goin retail or modding at a more serious level many times (even had a job offer to mod!!), but having to deal with the mystery of what you'll get to resell is scary, plus the time/work to make it right -- I'm too much of a perfectionist to make money at this.

I thought the SP70's were aggressively priced more recently. They could do the shelf right but I'm sure it takes more time/labor and these workers are under great pressure to produce.

Funtastic
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Thanks for your input Tom E.

I’ll have a go at sanding down the shelf after I get some sandpaper. I am going to push for a refund though because as a dealer I shouldn’t have to do this.

On one of the units there was a point in the center, sanded it but still no difference, guess I didn’t sand it down enough.

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Thanks for the warning, Funtastic. I wonder how little use those lights get to not see more reports on burned out LEDs here. If they’re all ending up on the shelf, it makes me no wonder that quality degrades over time.

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Funtastic wrote:
Thanks for your input Tom E. I'll have a go at sanding down the shelf after I get some sandpaper. I am going to push for a refund though because as a dealer I shouldn't have to do this. On one of the units there was a point in the center, sanded it but still no difference, guess I didn't sand it down enough.

I checked mine last night, bought in April of 2019 from the Sofirn Ali store for ~$55, and it had a small raised nub in the center, it should be easily sanded down. I've had it apart for months now - forgot what I was even planning for it, probably driver upgrade to run NarsilM/Anduril. After adding spring bypasses, mine hit like 8500 lumens (calibrated), 200 kcd. It's a big reflector.

On mine doing a quick check, looked like the center point was the only place not flat. Mostly the machining leaves the center raised, but if the center is depressed, it's a lot more complicated to get flat.

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